News tagged with food source

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Early warning signs of population collapse

Many factors—including climate change, overfishing or loss of food supply—can push a wild animal population to the brink of collapse. Ecologists have long sought ways to measure the risk of such a collapse, ...

Apr 10, 2013
3.8 / 5 (6) 0 | with audio podcast

Ants follow Fermat's principle of least time

(Phys.org) —Ants have long been known to choose the shortest of several routes to a food source, but what happens when the shortest route is not the fastest? This situation can occur, for example, when ...

Apr 01, 2013 feature
4.8 / 5 (21) 22 | with audio podcast

Streams stressed by pharmaceutical pollution

Pharmaceuticals commonly found in the environment are disrupting streams, with unknown impacts on aquatic life and water quality. So reports a new Ecological Applications paper, which highlights the ecolog ...

Apr 01, 2013
4.2 / 5 (5) 2 | with audio podcast